Technical Specifications:

• Input Types: TC (K, J, T, E, R, S, B, N, L, U, W), RTD (Pt100, Cu50, JPt100, Ni120), DC mA (0–20mA, 4–20mA), DC V (0–5V, 1–5V, 0–10V)
• Output: 4–20mA DC, 2-wire, loop-powered
• Power Supply: 24V DC, 10.5–42V DC operating range
• Isolation Voltage: 1500V AC between input, output, and power supply
• Accuracy: ±0.1% of span (for DC input), ±0.2% of span (for TC/RTD)
• Response Time: ≤ 200 ms (0–90% step response)
• Ambient Temperature: -20°C to +70°C
• Housing Material: Flame-retardant polycarbonate, IP65 rating
• Dimensions: 22.5 mm (W) × 115 mm (H) × 115 mm (D) for DIN rail mount

Functional Features:

• Input/output/power galvanic isolation (3-way isolation)
• Programmable input range and output range via HART communicator or DIP switches
• Linearization for thermocouples and RTDs
• Cold junction compensation for thermocouple inputs (built-in)
• Burnout detection for RTD and TC inputs (configurable)
• DIN rail mounting (35mm standard rail)

Working Principle:
The ADR541 receives the process signal at its input terminals. The signal is conditioned through an isolation amplifier and A/D conversion circuit. A microcontroller applies linearization, scaling, and cold junction compensation (for TC). The processed signal is converted back to a 4–20mA current output via a precision D/A converter. The entire circuit is powered by the 24V DC loop supplying the output current.

Advantages & Highlights:

• 3-way galvanic isolation eliminates ground loop errors
• HART 7 protocol compatibility enables remote configuration and diagnostics
• DIN rail mount saves panel space
• Wide input type flexibility in a single compact module
• Loop-powered design eliminates need for separate power supply

Applicable Industries:
Oil & Gas, Chemical, Power, Water Treatment, HVAC, Food Processing, Mining

Installation Requirements:

• Mount on 35mm DIN rail (EN 60715 standard)
• Wiring: use shielded twisted-pair cable for TC/RTD inputs
• Ground the shield at one end only (controller end)
• Maintain minimum 25 mm separation from high-power cables
• Ambient temperature range: -20°C to +70°C

Usage Precautions:

• Do not exceed 42V DC on the loop power supply
• Verify input signal range matches DIP switch or HART configuration before energizing
• For HART communication, use a 250 Ω resistor in series with the loop
• Do not open the housing in hazardous areas unless the unit is certified for the zone
• Ensure proper cold junction compensation when using thermocouple inputs